(branch) backport recent cmake changes from fedora

kf5.spec

@@ -1,6 +1,6 @@
 Name:    kf5
 Version: 5.68.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: Filesystem and RPM macros for KDE Frameworks 5
 License: BSD
 URL:     http://www.kde.org
@@ -51,8 +51,8 @@ mkdir -p %{buildroot}%{_sysconfdir}/xdg/plasma-workspace/{env,shutdown}
 install -Dpm644 %{_sourcedir}/macros.kf5 %{buildroot}%{_rpmconfigdir}/macros.d/macros.kf5
 sed -i \
   -e "s|@@KF5_VERSION@@|%{version}|g" \
-%if 0%{?rhel} || 0%{?rhel} > 7
-  -e 's|rhel:%{__cmake3}|rhel:%{__cmake}|' \
+%if 0%{?rhel} && 0%{?rhel} < 8
+  -e 's|%{__cmake}|%{__cmake3}|' \
 %endif
   %{buildroot}%{_rpmconfigdir}/macros.d/macros.kf5
 
@@ -80,6 +80,9 @@ sed -i \
 
 
 %changelog
+* Tue Aug 25 2020 Rex Dieter <rdieter@fedoraproject.org> - 5.68.0-2
+- (branch) backport recent cmake changes from fedora
+
 * Thu Mar 19 2020 Rex Dieter <rdieter@fedoraproject.org> - 5.68.0-1
 - 5.68
 

macros.kf5

@@ -16,13 +16,16 @@
 %_kf5_version @@KF5_VERSION@@
 
 %cmake_kf5 \
+  %undefine __cmake_in_source_build \
   QTDIR="%{_qt5_prefix}" ; export QTDIR ; \
   PATH="%{_qt5_bindir}:$PATH" ; export PATH ; \
   CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS ; \
   CXXFLAGS="${CXXFLAGS:-%optflags}" ; export CXXFLAGS ; \
   FFLAGS="${FFLAGS:-%optflags%{?_fmoddir: -I%_fmoddir}}" ; export FFLAGS ; \
   %{?__global_ldflags:LDFLAGS="${LDFLAGS:-%__global_ldflags}" ; export LDFLAGS ;} \
-  %{?fedora:%{__cmake}}%{?rhel:%{__cmake3}} \\\
+    %{__cmake} \\\
+    %{?__cmake_builddir:-S "%{_vpath_srcdir}"} \\\
+    %{?__cmake_builddir:-B "%{__cmake_builddir}"} \\\
     -DCMAKE_C_FLAGS_RELEASE:STRING="-DNDEBUG" \\\
     -DCMAKE_CXX_FLAGS_RELEASE:STRING="-DNDEBUG" \\\
     -DCMAKE_Fortran_FLAGS_RELEASE:STRING="-DNDEBUG" \\\